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-rw-r--r--uts/common/fs/zfs/sys/zrlock.h66
1 files changed, 66 insertions, 0 deletions
diff --git a/uts/common/fs/zfs/sys/zrlock.h b/uts/common/fs/zfs/sys/zrlock.h
new file mode 100644
index 000000000000..dcd63f7b5b91
--- /dev/null
+++ b/uts/common/fs/zfs/sys/zrlock.h
@@ -0,0 +1,66 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _SYS_ZRLOCK_H
+#define _SYS_ZRLOCK_H
+
+#include <sys/zfs_context.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct zrlock {
+ kmutex_t zr_mtx;
+ volatile int32_t zr_refcount;
+ kcondvar_t zr_cv;
+ uint16_t zr_pad;
+#ifdef ZFS_DEBUG
+ kthread_t *zr_owner;
+ const char *zr_caller;
+#endif
+} zrlock_t;
+
+extern void zrl_init(zrlock_t *);
+extern void zrl_destroy(zrlock_t *);
+#ifdef ZFS_DEBUG
+#define zrl_add(_z) zrl_add_debug((_z), __func__)
+extern void zrl_add_debug(zrlock_t *, const char *);
+#else
+extern void zrl_add(zrlock_t *);
+#endif
+extern void zrl_remove(zrlock_t *);
+extern int zrl_tryenter(zrlock_t *);
+extern void zrl_exit(zrlock_t *);
+extern int zrl_is_zero(zrlock_t *);
+extern int zrl_is_locked(zrlock_t *);
+#ifdef ZFS_DEBUG
+extern kthread_t *zrl_owner(zrlock_t *);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _SYS_ZRLOCK_H */